Analog Vs Digital Resolution - TV Lines (TVL) Compared to Pixels Explained. - By: Cesar Wyatt

One of the most confusing and difficult topics inside CCTV world is res. Most of us have digital camera models or video camcorders and get heard the term megapixel used as the most common comparison in resolution concerning various makes and designs. We are also aware that a larger number means better display quality, but many people do not know why. In the CCTV security camera world, though, most cameras are still analog and their res is measured differently from what we are used to.

Analog Resolution

As soon as measuring analog resolution, a TV line does not have a defined number with individual pixels. Instead, the term "TV lines" refers to the number of discernible horizontal or vertical lines to the screen. Analog security cameras are measured in Analog TELEVISION Lines, and most advisors have between 420 and 580. The higher number of TV Lines, the more info . captured. These types of cameras connect to a security DVR and CCTV VCR via coaxial movie cable.

Electronic digital Resolution

A pixel is a smallest element of searching for image. We have all zoomed too far into a picture from a website and seen this image go from clear to a lot of colored squares - every one of those squares is people pixel. A megapixel (MP) is 1 million pixels, and is a specific measurement for digital resolution that encompasses the area of the output video.

Case: If a camera outputs a signal that is 1280x1024 pixels, it can be shooting at a megapixel resolution of 1280 x 1024 = 1, 310, 720 pixels = 1. 3 Megapixels (MP).

The commonest type of digital video cameras are IP Cameras. These, like your digital camera in your house, use strictly digital res. They utilize a network link with either act as some sort of standalone device or connect with a network-based DVR (Digital Video Recorder) and also NVR (Network Video Recorder). IP Cameras have fixed resolutions and tend to be now approaching, and in lots of cases exceeding, 1 megapixel with resolution, on average. Many of these cameras also support POE (Electrical power Over Ethernet), allowing you them to be powered with the Ethernet cable used with regard to network connectivity, and PTZ (Pan Tilt Zoom), allowing for remote control of your pan, tilt and move features, if applicable.

A growing number of industry installers and experts are moving to network-based CCTV equipment due to the flexibility and expandability which it allows. Massive remotely-viewable security camera infrastructures are replacing old, out dated analog systems at an escalating rate and will soon become the preferred industry solution.

About the Author

Plasma screen televisions is a new type of audio-video entertainment that utilizes little, inert-gas filled cells together with electricity to create plasma.

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